Blind Benchmark Exercise for Spent Nuclear Fuel Decay Heat

Peter Jansson (Corresponding Author), Martin Bengtsson, Ulrika Bäckström, Francisco Álvarez-Velarde, Dušan Čalič, Stefano Caruso, Ron Dagan, Luca Fiorito, Lydie Giot, Kevin Govers, Augusto Hernandez Solis, Volker Hannstein, Germina Ilas, Marjan Kromar, Jaakko Leppänen, Marita Mosconi, Pedro Ortego, Rita Plukienė, Arturas Plukis, Anssu Ranta-AhoDimitri Rochman, Linus Ros, Shunsuke Sato, Peter Schillebeeckx, Ahmed Shama, Teodosi Simeonov, Alexey Stankovskiy, Holly Trellue, Stefano Vaccaro, Vanessa Vallet, Marc Verwerft, Gašper Žerovnik, Anders Sjöland

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)


The decay heat rate of five spent nuclear fuel assemblies of the pressurized water reactor type were measured by calorimetry at the interim storage for spent nuclear fuel in Sweden. Calculations of the decay heat rate of the five assemblies were performed by 20 organizations using different codes and nuclear data libraries resulting in 31 results for each assembly, spanning most of the current state-of-the-art practice. The calculations were based on a selected subset of information, such as reactor operating history and fuel assembly properties. The relative difference between the measured and average calculated decay heat rate ranged from 0.6% to 3.3% for the five assemblies. The standard deviation of these relative differences ranged from 1.9% to 2.4%.

Original languageEnglish
Pages (from-to)1125-1145
Number of pages21
JournalNuclear Science and Engineering
Issue number9
Publication statusPublished - 2022
MoE publication typeA1 Journal article-refereed


  • calorimeter
  • decay heat
  • experimental measure
  • Spent nuclear fuel
  • validation


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